[sdiy] speaking of tantalums...

rburnett at richieburnett.co.uk rburnett at richieburnett.co.uk
Mon Nov 26 22:18:50 CET 2018


Yes, high CV density, and also stable ESR over a range of temperature.  
By contrast Aluminium Electrolytics exhibit a rise in ESR at low 
temperatures. Something to do with reduced electron mobility in 
electrolyte when it gets near to freezing temperature I think is the 
explanation?

-Richie,


On 2018-11-26 19:54, Ingo Debus wrote:
>> Am 26.11.2018 um 06:29 schrieb Michael E Caloroso 
>> <mec.forumreader at gmail.com>:
>> 
>> Smallest capacitance per cubic inch, when the race was on for more
>> compact packages.
> 
> I remember back in the eighties many datasheets of high-quality analog
> ICs (Burr Brown comes to mind) had a recommendation like „decouple
> every power supply rail with a 10 uF tantalum and a 0.1 uF ceramic
> capacitor". This was certainly not because of the smaller size or
> leakage of tantalums vs. electrolytics. Maybe ESR or inductance?
> 
> Ingo
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